Rotary valve for explosion-engines.



F. G. SOHEHR.

ROTARY VALVE FOR EXPLOSION ENGINES.

APPLICATION FILED JUNE 10, 1912.

Patented Nov. 18 1913.

AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA GToN. D. c.

entrain s'rn'rns rst. enrich FREDEBIGK e. SCH-EH3,

0F DETROIT, MICHIGAN;

ROTARY VALVE FOB; EXPLOSION-ENGINES.

Specificationof Letters Patent;

Applicationfilettfune 10, 19.12. Serial No. 702,677. e

To all whom it may concern:

Be it known that I, FREDERICK'GJ. SCHEHR, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigamhave invented certain consists in various features of construction.

as hereinafter set forth.

In the-drawings: Figure 1 1s alongitudlnal section through. an exploslonengine cylinder to which my valve-is applied. Fig. 2

is a plan view. of the ported head of said cylinder. Fig. 3 is a plan of the valve. Fig. 4 is a horizontal section on the line arr-w of Fig. 1, showing the valve-balancing member; and Fig. 5'is a side elevation thereof.

A is the cylinder of an. engine and B is a ported head for said cylinder, the ports of which are controlled a rotary disk valve C. This valve ispreferably arranged on. the outer face of the head, and is provided with a port Ditherein, which alternately registers with the inlet and exhaust ports E and-F through the head B.

A is a cap for closing the head: havingsuitable ports E F therein communicating respectively with the inlet chamber:- E? and the exhaust chamber F in the cap. The valve is fixedly secured inv any suitable manner to a stem A which is driven in any wellknown way in. timed. relation. to the crank shaft.

During the explosion and compressionst-rokes of the engine the high gaseous pressure developed in the cylinder will act upon the portion of the valve disk which is eX- posed through the ports in the head B. This will tend to force the valve from its seat,

and also, by pressing unequally upon opposite sides of the center of the valve, will tend toftiltthe axis of rotation. I have therefore provided means for balancing this pressure,

preferably of the following construction:

G is an annular recess formed in the upper POItlOIL or the cylinder, above the travel of the piston. H is. an annular member fitting the recess G and having its outer and inner edges sealed by packing-rings I and J. The member H. 1s provided Wltll an inwardly extending center or spider-frame K, which is connected to a stem L passing axially" through the head" B; the outer end of this stem has the head M thereon. which engages a recess N in the valve C and forms an abutment for a thrust bearingO bearing against the bottom of the recess N. The arrangement is such that the ring H, which has an exposed area equal to the port area in the head; B, will be subjected to the pressure within the cylinder operating'in a direction contrary to that against the valve. As a re sult the stress. will be transmitted through the stem Lto the head M, andthrough the thrust bearing 0 to the valve, thereby preventing any movement of said valve from its seat. The packing rings 1 and J preventleakage of the compressed gases intothe recess G soas to eliminate the pressure on the opposite side of the ring H; The spiderframe is held against rotation in any suitable manner, as. by pins or projecting upwardly from the wall of the: recess G, positioned upon. opposite sides of the arms of the frame K.

It is usual in the construction of disk valves to form the ports thereof between radial lines. This requires a considerable angular movement in opening and closing the ports, which interferes with the opera tion of the engine. I have, therefore, pro vided: an improved construction of" port whereby not only may the area of the ports be increased-, but also a muclr quicker open ing and closing of the ports is obtained. As shown, the port D 1s 1n sp ral form and is adapted for registration with spirally formed cooperating ports E and F. By properly selecting the pitch and width of the spiral openings a port having a comparatively large area is obtained and during the rotation of the valve all portions of the port in the valve are simultaneously moved into Patented Nov..18 19:13.

and out of registration with the ports in the head, thereby effecting a very quick opening and closing of the in-let and exhaust ports.

Preferably the ports E F are of the same configuration as the ports E F and the chambers E F therefor are divided by a somewhat similarly shaped partition H.

'However this particular chambering of the cap and the configuration of the ports E F. While desirable, is not necessary since the shape of the ports E F controls the opening of the port D. Any desirable arrangement valve, an .annularly recessed member with which said annular'member is engaged to shield the opposite side thereof, and a tie between said annular member and said valve for transmitting the opposed stresses from one to the other. v

2. The combination with a ported seat of a disk valve forcontrolling said ported seat,

an annular member'having an area substant1ally equal to the port area of said seat, ex-

posed to gaseouspressure inopposite direction to that upon said valve, a thrust hearing for opposing the movement of said valve from its seat, and a tie between said thrust bearing and said annular member.

3; The combination with an engine cylinder having an annular recess in the upper portion thereof, of an annular member engaging said recess, a portedhead for said cylinder, a rotary disk valve seated on'the outer'face of said ported head, the area of saidv disk exposed through the ported head being substantially equal to the exposed area ofsaid annular member, and a tie'member passing axially through said head and connecting said valve and annular member.

4. The combinationwith an engine cylinder of a ported head'for said cylinder, a rotary disk valve seated upon the outer face ofsaid head, a, tie member engaging said valve and assin axiall throu h said head.

b V b an annular member, having a spider connectionwith said tie member, engaging an anof the valve.

nular recess in said cylinder and exposing an area'substantially equal to the port area of said head, to a pressure opposed to that against said valve whereby the valve is seat, of arotary disk valve engaging said seat, a non-rotating member exposed to a pressure opposed to'that upon said valve through said ported seat, and 'a tie member passing through said seat axially of said valve, and connectmg the latter wlth sald non-rotating member.

7. The combination'of'an explosion engine cylinder, having an annular recess in the upper portion thereof, of a portedhead for said cylinder, a rotary disk valve engaging the outer face of said head,.an annular member engaging said annular recess, and

havinga surface exposed to a pressure opposed to that against said valve through said ported seat, a tie member connected with said annular member and passing through said head in axial alinement with said valve, and a thrust bearing between the outer end of said tie member and said valve.

8. The combination with a valve seat having a spiral port therein, of a rotary disk valve engaging said seat and provided with a corresponding'spiral port.

9. The combination of a rotary valve having a spiral port extending upon opposite sides of the axis thereof anda valve seat provided with a corresponding spiral port. 10. The combination with a rotary disk valve having aspiral port extendingupon opposite sides of the axis thereof, of a valve seat having a plurality of spiral ports extending upon opposite sides of the axis of thevalve, and adapted for successive registrationwith said valve port in the rotation In testimony whereof I affix my'si nature in presence of two witnesses.

' FREDERICK G. SCHEHR. Witnesses: I

WV. J. BELKNAP, 1 LUCINDA E. SCHEHR.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, 

